CVE-2008-1147

What it is

A certain pseudo-random number generator (PRNG) algorithm that uses XOR and 2-bit random hops (aka "Algorithm X2"), as used in OpenBSD 2.6 through 3.4, Mac OS X 10 through 10.5.1, FreeBSD 4.4 through 7.0, and DragonFlyBSD 1.0 through 1.10.1, allows remote attackers to guess sensitive values such as IP fragmentation IDs by observing a sequence of previously generated values. NOTE: this issue can be leveraged for attacks such as injection into TCP packets and OS fingerprinting.

At a glance

Exploitability

Can be exploited over the network without logging in. Limited direct impact.

Exploit odds

1.8% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2008-03-04 23:44 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 22:51 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 1.8% in the next 30 days (EPSS).
• Severity: 6.8 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2008-03-04 23:44 UTC

Last modified

2026-06-16 22:51 UTC

Exploit probability

1.8% · EPSS, next 30 days

Record status

Modified

Affected

• Cosmicperl Directory Pro 10.0.3
• Darwin 1.0
• Darwin 9.1
• Navision Financials Server 3.0

Attack profile CVSS 2.0 · 6.8

Attack vector

Network

Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2008-1147.md and follow it. Check whether this project is affected by CVE-2008-1147. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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